Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 6, Pages 1821-1826Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200300u
Keywords
water purification; graphite oxide; mercury removal; diazonium chemistry; Rhodamine B; sand coating
Funding
- Nanoholdings LLC, Rowayton, Connecticut
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Retaining the inherent hydrophilic character of GO (graphite-oxide) nanosheets, sp(2) domains on GO are covalently modified with thiol groups by diazonium chemistry. The surface modified GO L adsorbs 6-fold higher concentration of aqueous mercuric ions than the unmodified GO. Core shell adsorbent granules, readily useable in filtration columns, are synthesized by assembling aqueous GO over sand granules. The nanostructured GO-coated sand retains at least 5-fold higher concentration of heavy metal and organic dye than pure sand. The research results could open avenues for developing low-cost water purification materials for the developing economies.
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